Isometric Graph Paper Pad 08.5x11 50 Shts - Isometric Paper - 20# white sulphite paper are available in English (non-photo blue grids) in most cases. Ideal for mechanical drawing or design needs, especially machine design, architecture and patent office drafting. Drawings on these sheets can be scaled in three main directions, the axes of which are 120° apart, one being vertical, the other at 30° from the horizontal.